Updated monthlyPerth price guide Air conditioning
Air conditioning
installation cost in Perth
Air conditioning installation in Perth costs $1,400–$2,250 for a small split system, $2,350–$3,600 for a large living-area split, and $9,000–$15,000 for whole-home ducted, fully installed, with the biggest price swings driven by suburb, housing stock and season.
What will yours cost?
Licensed installers who service your postcode quote your exact job.
What Perth homeowners actually pay
| Job | Installed price | Suits |
|---|---|---|
| 2.5kW split, bedroom, back-to-back install | $1,400–$1,850 | Single bedroom or home office |
| 3.5–5kW split, living room, standard install | $1,950–$2,800 | Apartment living area, medium lounge |
| 7kW split, open-plan living | $2,850–$3,600 | Large open-plan house living zone |
| Ducted, single storey, zoned | $9,000–$12,000 | 3-bed single-storey with roof access |
| Ducted, two storey, zoned | $12,000–$15,000 | 4-bed two-storey family home |
Local factors
Where you live changes the quote
Timing matters
Same house, same unit, different month, different price.
What the same installed job costs through the year, versus fair shoulder-season pricing.
Perth installation cost FAQs
How much does it cost to install a split system in Perth?
A small bedroom split costs $1,400–$2,250 installed in Perth; a large living-area split runs $2,350–$3,600. Brand and install complexity set the spread within those ranges.
What does ducted air conditioning cost in Perth?
$9,000–$15,000 installed for most Perth homes. Single-storey brick-and-tile with a clean roof cavity sits at the lower end; two-storey homes and evaporative-to-refrigerated conversions price toward the top.
Is it worth replacing evaporative cooling with refrigerated aircon?
On humid days and 40°C runs, refrigerated wins comfortably, which is why the conversion is so common in Perth. Treat it as a new system: new ductwork, new electrical load, and quote it against simply servicing the old evap unit so you’re comparing honestly.
When is the cheapest time to install aircon in Perth?
Autumn and winter. Perth demand explodes with the first 38°C week, often before Christmas, and installers book out fast. The same job quoted in May or June skips the queue and usually beats the summer price.
How long does installation take in Perth?
Once quoted, most split installs are a half-day job scheduled within 1–2 weeks. Ducted installs run 1–2 days on site, evap conversions can add time for duct removal. In peak summer, add 2–4 weeks of queue.
The evap replacement job
Swapping old evaporative cooling for refrigerated ducted is Perth’s signature install. The old ductwork usually can’t be reused, so quote it as a full system, not a swap.
Size for February
Perth summers bring long dry runs near 40°C. Coastal suburbs get the afternoon sea breeze; inland suburbs don’t, and need the extra capacity.
Brick-and-tile keeps ducted sharp
Perth’s single-storey brick-and-tile stock with accessible roof cavities is easy ducted territory, quotes here are often sharper than the east coast.
No WA rebate
There’s no state scheme for aircon in WA. Efficiency is the rebate, the gap between units shows up on every summer bill for ten years.